2024MNRAS.529.4442S

Query : 2024MNRAS.529.4442S

2024MNRAS.529.4442S - Mon. Not. R. Astron. Soc., 529, 4442-4454 (2024/April-3)

Tight stellar binaries favour active longitudes at sub- and antistellar points.

SETHI R. and MARTIN D.V.

Abstract (from CDS):

Stellar binaries are ubiquitous in the galaxy and a laboratory for astrophysical effects. We use TESS to study photometric modulations in the light curves of 162 unequal mass eclipsing binaries from the EBLM (Eclipsing Binary Low Mass) survey, comprising F/G/K primaries and M-dwarf secondaries. We detect modulations on 81 eclipsing binaries. We catalogue the rotation rates of the primary star in 69 binaries and discover 17 ellipsoidal variables. In a large portion (at least $\sim 51~{{\ \rm per\ cent}}$) of our sample, we detect photometric modulations consistent with two overdensities of spots on the primary star that are roughly 180° apart. We show that these so-called active longitudes are preferentially at the sub- and antistellar points on the primary star. Physically, this means that the spots on the primary star preferentially face directly towards and away from the secondary star.

Abstract Copyright: © 2024 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.

Journal keyword(s): techniques: photometric - eclipsing - binaries: general - binaries: spectroscopic

CDS comments: 27 unidentified EBLMs in table A1.

Simbad objects: 59

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Number of rows : 59
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 TOI-242 SB* 00 17 48.3515944440 -38 06 38.930602572   13.499 12.976 12.953   ~ 7 0
2 BD-16 52 SB* 00 21 00.7727364192 -16 07 28.608938940   10.49 9.80     G5 5 0
3 TYC 7528-481-1 SB* 00 27 16.5233107872 -41 34 17.682832092   12.53 11.76     ~ 9 0
4 UCAC2 1664956 SB* 00 35 40.4456677344 -69 48 52.390799928   12.59 12.02 11.98 11.39 ~ 7 0
5 TYC 11-1042-1 SB* 00 40 01.4990540232 +01 05 40.379781696   12.00 11.39     ~ 12 0
6 TYC 8848-560-1 SB* 00 48 21.4790568768 -66 09 36.975247452   12.054 11.555     ~ 11 0
7 TYC 5850-383-1 SB* 00 57 58.9513215384 -19 49 47.465388336   12.44 11.65     ~ 7 0
8 BD-20 499 SB* 02 39 29.2866721416 -20 02 23.987131656   11.34 10.63     ~ 5 0
9 HD 17577 SB* 02 47 20.5053089496 -51 27 10.396755180   10.08 9.55     F5V 15 0
10 1SWASP J032645.00-092031.6 SB* 03 26 45.0194559144 -09 20 31.666130988           ~ 6 0
11 TYC 67-354-1 SB* 03 39 09.6380569440 +03 05 37.670638992   11.73 11.38     ~ 7 0
12 TOI-395 SB* 03 45 13.0975077792 -10 58 24.157584300   11.888 11.280     ~ 13 0
13 BD-07 690 SB* 03 51 00.5375660160 -07 05 55.023490500   11.19 10.77     ~ 6 0
14 EBLM J0400-51 SB* 04 00 56.8899712488 -51 07 27.451329132           ~ 5 0
15 GSC 07041-00214 SB* 04 32 58.7929757544 -33 29 47.913782640   11.602 11.135 11.132   ~ 10 1
16 TYC 8079-909-1 SB* 04 40 14.5873545144 -48 17 52.681133580   12.058 11.521     ~ 8 0
17 TYC 4747-1130-1 SB* 04 43 01.7709539640 -06 25 50.741310180   11.95 11.60     ~ 6 0
18 EBLM J0454-09 SB* 04 54 11.2360127040 -09 29 53.378478348           ~ 7 0
19 TYC 7587-505-1 SB* 05 02 38.5863320160 -38 43 31.053476712   12.58 12.06     ~ 2 0
20 CD-39 1898 SB* 05 18 46.4767337736 -39 03 16.351373808   10.624 10.190     ~ 9 0
21 1SWASP J052059.46-064216.6 SB* 05 20 59.4757372248 -06 42 16.593082272   12.653 12.052 11.970   ~ 5 0
22 1SWASP J052604.85+045135.4 SB* 05 26 04.8492103920 +04 51 35.408332368   12.858 12.175 12.081   G2 11 0
23 EBLM J0546-18 SB* 05 46 04.8071516736 -18 17 54.570440184           ~ 4 0
24 UCAC4 230-008186 * 06 06 18.1330902673 -44 02 15.513880427   12.799 12.240 12.178   ~ 2 0
25 TYC 8521-144-1 SB* 06 10 53.6167503192 -52 53 46.568612220   11.55 11.13     ~ 5 0
26 TYC 8102-960-1 SB* 06 21 53.5340464488 -46 13 10.078655016   12.83 11.97     ~ 3 0
27 TYC 8114-1646-1 SB* 06 21 56.6453827632 -50 55 32.441201220   12.27 11.94     ~ 6 0
28 TYC 6514-1296-1 SB* 06 23 11.4323019072 -27 43 44.905209852   12.25 11.65     ~ 5 0
29 UCAC4 232-008836 SB* 06 25 16.0666815984 -43 47 11.893396884   12.679 12.021 12.009   ~ 5 0
30 CD-60 1544 SB* 06 42 03.3328098144 -60 40 13.007842140   10.60 10.11     ~ 10 0
31 HD 49816 SB* 06 49 06.0079523496 -27 20 58.402744980   10.57 10.09     F6V 12 0
32 TYC 8908-677-1 SB* 06 59 07.7857169736 -61 50 24.242250768   12.43 11.36     ~ 11 0
33 BD+05 2082 SB* 08 55 27.4881375288 +04 50 04.751854440   9.60 9.17     F0 15 0
34 TYC 7167-584-1 SB* 09 41 16.7628253152 -31 49 10.305656076   11.62 11.08     ~ 8 0
35 HD 85004 SB* 09 48 49.4564901792 -08 29 36.428228556   9.74 9.31     F0V 15 0
36 TYC 7711-1449-1 SB* 10 07 10.0798234464 -40 28 16.726796544   11.24 10.79     ~ 7 0
37 1SWASP J101350.84+015928.1 SB* 10 13 50.8314491832 +01 59 28.227909696   12.05 11.87     ~ 17 0
38 TYC 7721-539-1 SB* 10 23 58.0359464798 -43 25 26.741063909   12.44 11.99     ~ 6 0
39 V* HS Hya SB* 10 24 36.7678198944 -19 05 32.956244232   8.55 8.10     F5V 123 0
40 CD-29 8443 SB* 10 34 18.9044157240 -29 48 55.385348148   11.22 10.76 10.73   ~ 5 1
41 TYC 6637-975-1 SB* 10 37 06.9438907800 -25 34 17.726593980   10.655 10.16 9.83 9.705 ~ 18 0
42 UCAC4 224-050979 SB* 10 37 27.4845796368 -45 21 48.166680024   13.276 12.693 12.619   ~ 4 0
43 TYC 7737-608-1 SB* 11 04 34.8873247608 -43 14 25.126074636   12.03 11.62     ~ 3 0
44 DTARPS-S 450 SB* 11 16 44.4209121480 -01 52 07.582035000           ~ 6 0
45 HD 101579 SB* 11 41 12.1883962416 -37 47 29.617446372   10.13 9.57     F7V 13 0
46 HD 105495 SB* 12 08 41.3387634552 -29 39 46.792294992   10.51 10.09     F2V 8 0
47 TYC 7814-156-1 SB* 14 33 45.0306959928 -43 00 39.921593580   11.77 11.44     ~ 3 0
48 V* CM Dra BY* 16 34 20.3302660573 +57 09 44.368918696   14.50 12.87 10.85 9.26 M4.5V 467 0
49 HD 190583 SB* 20 11 19.7333146032 -71 40 02.452314576   9.862 9.29     F6/7IV 13 0
50 TYC 500-1187-1 Ro* 20 17 35.8427243880 +02 15 51.096886272   11.83 11.39     ~ 8 0
51 TYC 8405-863-1 SB* 20 25 25.4801975808 -45 49 45.159870216   11.87 11.15     ~ 4 0
52 HD 197481 BY* 20 45 09.5324974119 -31 20 27.237889841   10.05 8.627 9.078 6.593 M1VeBa1 1344 0
53 TYC 7969-518-1 SB* 21 07 11.0655324768 -39 45 58.764498300   12.50 12.03     ~ 4 0
54 UCAC4 171-209209 SB* 21 53 16.5014981688 -55 59 07.364063040   13.503 12.880 12.746   ~ 9 0
55 HD 210330 SB* 22 10 48.7449703992 -48 53 26.328858828   9.27 8.77     F6V 16 0
56 HD 213513 SB* 22 32 30.2908976376 -31 14 39.204014568   10.87 10.35     F3V 16 0
57 CD-37 14854 SB* 22 36 40.3162105032 -36 56 38.725876644   11.47 10.99     ~ 4 0
58 TYC 8448-418-1 SB* 23 08 45.6742747536 -46 06 36.716465412   11.73 11.35     ~ 7 0
59 TYC 7519-142-1 SB* 23 49 15.2397740040 -32 46 17.466168252   12.14 11.52     ~ 10 0

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